BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 10766 Comm: kworker/u4:1 Not tainted 5.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:2840 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:2914 [inline]
 validate_chain kernel/locking/lockdep.c:2935 [inline]
 __lock_acquire.cold+0x263/0x288 kernel/locking/lockdep.c:3954
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4484
 write_seqcount_begin_nested include/linux/seqlock.h:377 [inline]
 write_seqcount_begin include/linux/seqlock.h:382 [inline]
 psi_group_change kernel/sched/psi.c:690 [inline]
 psi_task_change+0x276/0x9f0 kernel/sched/psi.c:781
 psi_enqueue kernel/sched/stats.h:82 [inline]
 enqueue_task kernel/sched/core.c:1303 [inline]
 activate_task+0x20f/0x470 kernel/sched/core.c:1329
 ttwu_do_activate+0xca/0x130 kernel/sched/core.c:2260
 ttwu_queue kernel/sched/core.c:2405 [inline]
 try_to_wake_up+0xace/0x17c0 kernel/sched/core.c:2639
 wake_up_worker kernel/workqueue.c:836 [inline]
 insert_work+0x2ad/0x3a0 kernel/workqueue.c:1337
 __queue_work+0x50d/0x1280 kernel/workqueue.c:1488
 queue_work_on+0x18b/0x200 kernel/workqueue.c:1515
 queue_work include/linux/workqueue.h:507 [inline]
 synchronize_rcu_expedited+0x3bf/0x5d0 kernel/rcu/tree_exp.h:862
 synchronize_net+0x37/0x50 net/core/dev.c:9941
 rollback_registered_many+0xa08/0xe70 net/core/dev.c:8860
 rollback_registered+0xf2/0x1c0 net/core/dev.c:8871
 unregister_netdevice_queue net/core/dev.c:9967 [inline]
 unregister_netdevice_queue+0x1d7/0x2b0 net/core/dev.c:9960
 unregister_netdevice include/linux/netdevice.h:2725 [inline]
 internal_dev_destroy+0xb8/0x150 net/openvswitch/vport-internal_dev.c:220
 __dp_destroy+0x32b/0x430 net/openvswitch/datapath.c:1755
 ovs_exit_net+0x266/0xba0 net/openvswitch/datapath.c:2472
 ops_exit_list.isra.0+0xa8/0x150 net/core/net_namespace.c:186
 cleanup_net+0x511/0xa50 net/core/net_namespace.c:603
 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
tipc: TX() has been purged, node left!